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各位朋友,PAS文件如下,当DBGridEh里面的内容超过65536条的时候,导出到EXCEL的时候就不正常,小弟想实现如下目的:将DBGridEh里面的内容导出到EXCEL的时候,超过6万条的,就自动导出到当前EXCEL文件的另外一个SHEET,如果当前的SHEET满了6万条,又继续导出到当前文件的另外一个SHEET,依次类推,使其导出的数据不局限于6万条记录左右,其实整个程序的难点就在于,如何判断当前的SHEET已经满,当前导出的记录已经导出到第几条,请问有没有大虾可以帮忙修改一下下面的PAS文件,使其可以实现上面的功能呢?
诚心向各位大虾求救,万分感谢!!!
unit U_DBGridEhToExcel;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, ComCtrls, ExtCtrls, StdCtrls, Gauges, DBGridEh, ShellApi;
type
TTitleCell = array of array of string;
//分解DBGridEh的标题
TDBGridEhTitle = class
private
FDBGridEh: TDBGridEh; //对应DBGridEh
FColumnCount: integer; //DBGridEh列数(指visible为True的列数)
FRowCount: integer; //DBGridEh多表头层数(没有多表头则层数为1)
procedure SetDBGridEh(const Value: TDBGridEh);
function GetTitleRow: integer; //获取DBGridEh多表头层数
function GetTitleColumn: integer; //获取DBGridEh列数
public
//分解DBGridEh标题,由TitleCell二维动态数组返回
procedure GetTitleData(var TitleCell: TTitleCell);
published
property DBGridEh: TDBGridEh read FDBGridEh write SetDBGridEh;
property ColumnCount: integer read FColumnCount;
property RowCount: integer read FRowCount;
end;
TDBGridEhToExcel = class(TComponent)
private
FCol: integer;
FRow: integer;
FProgressForm: TForm; {进度窗体}
FGauge: TGauge; {进度条}
Stream: TStream; {输出文件流}
FBookMark: TBookmark;
FShowProgress: Boolean; {是否显示进度窗体}
FDBGridEh: TDBGridEh;
FBeginDate: TCaption; {开始日期}
FTitleName: TCaption; {Excel文件标题}
FEndDate: TCaption; {结束日期}
FUserName: TCaption; {制表人}
FFileName: string; {保存文件名}
procedure SetShowProgress(const Value: Boolean);
procedure SetDBGridEh(const Value: TDBGridEh);
procedure SetBeginDate(const Value: TCaption);
procedure SetEndDate(const Value: TCaption);
procedure SetTitleName(const Value: TCaption);
procedure SetUserName(const Value: TCaption);
procedure SetFileName(const Value: string);
procedure IncColRow;
procedure WriteBlankCell; {写空单元格}
{写数字单元格}
procedure WriteFloatCell(const AValue: Double; const IncStatus: Boolean = True);
{写整型单元格}
procedure WriteIntegerCell(const AValue: Integer; const IncStatus: Boolean = True);
{写字符单元格}
procedure WriteStringCell(const AValue: string; const IncStatus: Boolean = True);
procedure WritePrefix;
procedure WriteSuffix;
procedure WriteHeader; {输出Excel标题}
procedure WriteTitle; {输出Excel列标题}
procedure WriteDataCell; {输出数据集内容}
procedure WriteFooter; {输出DBGridEh表脚}
procedure SaveStream(aStream: TStream);
procedure CreateProcessForm(AOwner: TComponent); {生成进度窗体}
{根据表格修改数据集字段顺序及字段中文标题}
procedure SetDataSetCrossIndexDBGridEh;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure ExportToExcel; {输出Excel文件}
published
property DBGridEh: TDBGridEh read FDBGridEh write SetDBGridEh;
property ShowProgress: Boolean read FShowProgress write SetShowProgress;
property TitleName: TCaption read FTitleName write SetTitleName;
property BeginDate: TCaption read FBeginDate write SetBeginDate;
property EndDate: TCaption read FEndDate write SetEndDate;
property UserName: TCaption read FUserName write SetUserName;
property FileName: string read FFileName write SetFileName;
end;
var
CXlsBof: array[0..5] of Word = ($809, 8, 0, $10, 0, 0);
CXlsEof: array[0..1] of Word = ($0A, 00);
CXlsLabel: array[0..5] of Word = ($204, 0, 0, 0, 0, 0);
CXlsNumber: array[0..4] of Word = ($203, 14, 0, 0, 0);
CXlsRk: array[0..4] of Word = ($27E, 10, 0, 0, 0);
CXlsBlank: array[0..4] of Word = ($201, 6, 0, 0, $17);
implementation
{ TDBGridEhTitle }
function TDBGridEhTitle.GetTitleColumn: integer;
var
i, ColumnCount: integer;
begin
ColumnCount := 0;
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
Inc(ColumnCount);
end;
Result := ColumnCount;
end;
procedure TDBGridEhTitle.GetTitleData(var TitleCell: TTitleCell);
var
i, Row, Col: integer;
Caption: string;
begin
FColumnCount := GetTitleColumn;
FRowCount := GetTitleRow;
SetLength(TitleCell, FColumnCount, FRowCount);
Row := 0;
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
begin
Col := 0;
Caption := DBGridEh.Columns.Title.Caption;
while POS('|', Caption) > 0 do
begin
TitleCell[Row, Col] := Copy(Caption, 1, Pos('|', Caption) - 1);
Caption := Copy(Caption, Pos('|', Caption) + 1, Length(Caption));
Inc(Col);
end;
TitleCell[Row, Col] := Caption;
Inc(Row);
end;
end;
end;
function TDBGridEhTitle.GetTitleRow: integer;
var
i, j: integer;
MaxRow, Row: integer;
begin
MaxRow := 1;
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
Row := 1;
for j := 0 to Length(DBGridEh.Columns.Title.Caption) do
begin
if DBGridEh.Columns.Title.Caption[j] = '|' then
Inc(Row);
end;
if MaxRow < Row then
MaxRow := Row;
end;
Result := MaxRow;
end;
procedure TDBGridEhTitle.SetDBGridEh(const Value: TDBGridEh);
begin
FDBGridEh := Value;
end;
{ TDBGridEhToExcel }
constructor TDBGridEhToExcel.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FShowProgress := True;
end;
procedure TDBGridEhToExcel.SetShowProgress(const Value: Boolean);
begin
FShowProgress := Value;
end;
procedure TDBGridEhToExcel.SetDBGridEh(const Value: TDBGridEh);
begin
FDBGridEh := Value;
end;
procedure TDBGridEhToExcel.SetBeginDate(const Value: TCaption);
begin
FBeginDate := Value;
end;
procedure TDBGridEhToExcel.SetEndDate(const Value: TCaption);
begin
FEndDate := Value;
end;
procedure TDBGridEhToExcel.SetTitleName(const Value: TCaption);
begin
FTitleName := Value;
end;
procedure TDBGridEhToExcel.SetUserName(const Value: TCaption);
begin
FUserName := Value;
end;
procedure TDBGridEhToExcel.SetFileName(const Value: string);
begin
FFileName := Value;
end;
procedure TDBGridEhToExcel.IncColRow;
begin
if FCol = DBGridEh.DataSource.DataSet.FieldCount - 1 then
begin
Inc(FRow);
FCol := 0;
end
else
Inc(FCol);
end;
procedure TDBGridEhToExcel.WriteBlankCell;
begin
CXlsBlank[2] := FRow;
CXlsBlank[3] := FCol;
Stream.WriteBuffer(CXlsBlank, SizeOf(CXlsBlank));
IncColRow;
end;
procedure TDBGridEhToExcel.WriteFloatCell(const AValue: Double; const IncStatus: Boolean = True);
begin
CXlsNumber[2] := FRow;
CXlsNumber[3] := FCol;
Stream.WriteBuffer(CXlsNumber, SizeOf(CXlsNumber));
Stream.WriteBuffer(AValue, 8);
if IncStatus then
IncColRow;
end;
procedure TDBGridEhToExcel.WriteIntegerCell(const AValue: Integer; const IncStatus: Boolean = True);
var
V: Integer;
begin
CXlsRk[2] := FRow;
CXlsRk[3] := FCol;
Stream.WriteBuffer(CXlsRk, SizeOf(CXlsRk));
V := (AValue shl 2) or 2;
Stream.WriteBuffer(V, 4);
if IncStatus then
IncColRow;
end;
procedure TDBGridEhToExcel.WriteStringCell(const AValue: string; const IncStatus: Boolean = True);
var
L: integer;
begin
L := Length(AValue);
CXlsLabel[1] := 8 + L;
CXlsLabel[2] := FRow;
CXlsLabel[3] := FCol;
CXlsLabel[5] := L;
Stream.WriteBuffer(CXlsLabel, SizeOf(CXlsLabel));
Stream.WriteBuffer(Pointer(AValue)^, L);
if IncStatus then
IncColRow;
end;
procedure TDBGridEhToExcel.WritePrefix;
begin
Stream.WriteBuffer(CXlsBof, SizeOf(CXlsBof));
end;
procedure TDBGridEhToExcel.WriteSuffix;
begin
Stream.WriteBuffer(CXlsEof, SizeOf(CXlsEof));
end;
procedure TDBGridEhToExcel.WriteHeader;
var
OpName, OpDate: string;
begin
//标题
FCol := 3;
WriteStringCell(TitleName, False);
FCol := 0;
Inc(FRow);
if Trim(BeginDate) <> '' then
begin
//开始日期
FCol := 0;
WriteStringCell(BeginDate, False);
FCol := 0
end;
if Trim(EndDate) <> '' then
begin
//结束日期
FCol := 5;
WriteStringCell(EndDate, False);
FCol := 0;
end;
if (Trim(BeginDate) <> '') or (Trim(EndDate) <> '') then
Inc(FRow);
//制表人
OpName := '制表人:' + UserName;
FCol := 0;
WriteStringCell(OpName, False);
FCol := 0;
//制表时间
OpDate := '制表时间:' + DateTimeToStr(Now);
FCol := 5;
WriteStringCell(OpDate, False);
FCol := 0;
Inc(FRow);
end;
procedure TDBGridEhToExcel.WriteTitle;
var
i, j: integer;
DBGridEhTitle: TDBGridEhTitle;
TitleCell: TTitleCell;
begin
DBGridEhTitle := TDBGridEhTitle.Create;
try
DBGridEhTitle.DBGridEh := FDBGridEh;
DBGridEhTitle.GetTitleData(TitleCell);
try
for i := 0 to DBGridEhTitle.RowCount - 1 do
begin
for j := 0 to DBGridEhTitle.ColumnCount - 1 do
begin
FCol := j;
WriteStringCell(TitleCell[j, i], False);
end;
Inc(FRow);
end;
FCol := 0;
except
end;
finally
DBGridEhTitle.Free;
end;
end;
procedure TDBGridEhToExcel.WriteDataCell;
var
i: integer;
begin
DBGridEh.DataSource.DataSet.DisableControls;
FBookMark := DBGridEh.DataSource.DataSet.GetBookmark;
try
DBGridEh.DataSource.DataSet.First;
while not DBGridEh.DataSource.DataSet.Eof do
begin
for i := 0 to DBGridEh.DataSource.DataSet.FieldCount - 1 do
begin
if DBGridEh.DataSource.DataSet.Fields.IsNull or (not DBGridEh.DataSource.DataSet.Fields.Visible) then
WriteBlankCell
else
begin
case DBGridEh.DataSource.DataSet.Fields.DataType of
ftSmallint, ftInteger, ftWord, ftAutoInc, ftBytes:
WriteIntegerCell(DBGridEh.DataSource.DataSet.Fields.AsInteger);
ftFloat, ftCurrency, ftBCD:
WriteFloatCell(DBGridEh.DataSource.DataSet.Fields.AsFloat);
else
if DBGridEh.DataSource.DataSet.Fields is TBlobfield then // 此类型的字段(图像等)暂无法读取显示
WriteStringCell('')
else
WriteStringCell(DBGridEh.DataSource.DataSet.Fields.AsString);
end;
end;
end;
//显示进度条进度过程
if ShowProgress then
begin
FGauge.Progress := DBGridEh.DataSource.DataSet.RecNo;
FGauge.Refresh;
end;
DBGridEh.DataSource.DataSet.Next;
end;
finally
if DBGridEh.DataSource.DataSet.BookmarkValid(FBookMark) then
DBGridEh.DataSource.DataSet.GotoBookmark(FBookMark);
DBGridEh.DataSource.DataSet.EnableControls;
end;
end;
procedure TDBGridEhToExcel.WriteFooter;
var
i, j: integer;
begin
if DBGridEh.FooterRowCount = 0 then exit;
FCol := 0;
if DBGridEh.FooterRowCount = 1 then
begin
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
begin
WriteStringCell(DBGridEh.Columns.Footer.Value, False);
Inc(FCol);
end;
end;
end
else if DBGridEh.FooterRowCount > 1 then
begin
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
begin
for j := 0 to DBGridEh.Columns.Footers.Count - 1 do
begin
WriteStringCell(DBGridEh.Columns.Footers[j].Value, False);
Inc(FRow);
end;
Inc(FCol);
FRow := FRow - DBGridEh.Columns.Footers.Count;
end;
end;
end;
FCol := 0;
end;
procedure TDBGridEhToExcel.SaveStream(aStream: TStream);
begin
FCol := 0;
FRow := 0;
Stream := aStream;
//输出前缀
WritePrefix;
//输出表格标题
WriteHeader;
//输出列标题
WriteTitle;
//输出数据集内容
WriteDataCell;
//输出DBGridEh表脚
WriteFooter;
//输出后缀
WriteSuffix;
end;
procedure TDBGridEhToExcel.ExportToExcel;
var
FileStream: TFileStream;
Msg: string;
begin
//如果数据集为空或没有打开则退出
if (DBGridEh.DataSource.DataSet.IsEmpty) or (not DBGridEh.DataSource.DataSet.Active) then
exit;
//如果保存的文件名为空则退出
if Trim(FileName) = '' then
exit;
//根据表格修改数据集字段顺序及字段中文标题
SetDataSetCrossIndexDBGridEh;
Screen.Cursor := crHourGlass;
try
try
if FileExists(FileName) then
begin
Msg := '已存在文件(' + FileName + '),是否覆盖?';
if Application.MessageBox(PChar(Msg), '提示', MB_YESNO + MB_ICONQUESTION + MB_DEFBUTTON2) = IDYES then
begin
//删除文件
DeleteFile(FileName)
end
else
exit;
end;
//显示进度窗体
if ShowProgress then
CreateProcessForm(nil);
FileStream := TFileStream.Create(FileName, fmCreate);
try
//输出文件
SaveStream(FileStream);
finally
FileStream.Free;
end;
//打开Excel文件
ShellExecute(0, 'Open', PChar(FileName), nil, nil, SW_SHOW);
except
end;
finally
if ShowProgress then
FreeAndNil(FProgressForm);
Screen.Cursor := crDefault;
end;
end;
destructor TDBGridEhToExcel.Destroy;
begin
inherited Destroy;
end;
procedure TDBGridEhToExcel.CreateProcessForm(AOwner: TComponent);
var
Panel: TPanel;
Prompt: TLabel; {提示的标签}
begin
if Assigned(FProgressForm) then
exit;
FProgressForm := TForm.Create(AOwner);
with FProgressForm do
begin
try
Font.Name := '宋体'; {设置字体}
Font.Size := 9;
BorderStyle := bsNone;
Width := 300;
Height := 100;
BorderWidth := 1;
Color := clBlack;
Position := poScreenCenter;
Panel := TPanel.Create(FProgressForm);
with Panel do
begin
Parent := FProgressForm;
Align := alClient;
BevelInner := bvNone;
BevelOuter := bvRaised;
Caption := '';
end;
Prompt := TLabel.Create(Panel);
with Prompt do
begin
Parent := Panel;
AutoSize := True;
Left := 25;
Top := 25;
Caption := '正在导出数据,请稍候......';
Font.Style := [fsBold];
end;
FGauge := TGauge.Create(Panel);
with FGauge do
begin
Parent := Panel;
ForeColor := clBlue;
Left := 20;
Top := 50;
Height := 13;
Width := 260;
MinValue := 0;
MaxValue := DBGridEh.DataSource.DataSet.RecordCount;
end;
except
end;
end;
FProgressForm.Show;
FProgressForm.Update;
end;
procedure TDBGridEhToExcel.SetDataSetCrossIndexDBGridEh;
var
i: integer;
begin
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
DBGridEh.DataSource.DataSet.FieldByName(DBGridEh.Columns.Items.FieldName).Index := i;
DBGridEh.DataSource.DataSet.FieldByName(DBGridEh.Columns.Items.FieldName).DisplayLabel
:= DBGridEh.Columns.Items.Title.Caption;
DBGridEh.DataSource.DataSet.FieldByName(DBGridEh.Columns.Items.FieldName).Visible :=
DBGridEh.Columns.Items.Visible;
end;
for i := 0 to DBGridEh.DataSource.DataSet.FieldCount - 1 do
begin
if POS('*****', DBGridEh.DataSource.DataSet.Fields.DisplayLabel) > 0 then
DBGridEh.DataSource.DataSet.Fields.Visible := False;
end;
end;
end.
诚心向各位大虾求救,万分感谢!!!
unit U_DBGridEhToExcel;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, ComCtrls, ExtCtrls, StdCtrls, Gauges, DBGridEh, ShellApi;
type
TTitleCell = array of array of string;
//分解DBGridEh的标题
TDBGridEhTitle = class
private
FDBGridEh: TDBGridEh; //对应DBGridEh
FColumnCount: integer; //DBGridEh列数(指visible为True的列数)
FRowCount: integer; //DBGridEh多表头层数(没有多表头则层数为1)
procedure SetDBGridEh(const Value: TDBGridEh);
function GetTitleRow: integer; //获取DBGridEh多表头层数
function GetTitleColumn: integer; //获取DBGridEh列数
public
//分解DBGridEh标题,由TitleCell二维动态数组返回
procedure GetTitleData(var TitleCell: TTitleCell);
published
property DBGridEh: TDBGridEh read FDBGridEh write SetDBGridEh;
property ColumnCount: integer read FColumnCount;
property RowCount: integer read FRowCount;
end;
TDBGridEhToExcel = class(TComponent)
private
FCol: integer;
FRow: integer;
FProgressForm: TForm; {进度窗体}
FGauge: TGauge; {进度条}
Stream: TStream; {输出文件流}
FBookMark: TBookmark;
FShowProgress: Boolean; {是否显示进度窗体}
FDBGridEh: TDBGridEh;
FBeginDate: TCaption; {开始日期}
FTitleName: TCaption; {Excel文件标题}
FEndDate: TCaption; {结束日期}
FUserName: TCaption; {制表人}
FFileName: string; {保存文件名}
procedure SetShowProgress(const Value: Boolean);
procedure SetDBGridEh(const Value: TDBGridEh);
procedure SetBeginDate(const Value: TCaption);
procedure SetEndDate(const Value: TCaption);
procedure SetTitleName(const Value: TCaption);
procedure SetUserName(const Value: TCaption);
procedure SetFileName(const Value: string);
procedure IncColRow;
procedure WriteBlankCell; {写空单元格}
{写数字单元格}
procedure WriteFloatCell(const AValue: Double; const IncStatus: Boolean = True);
{写整型单元格}
procedure WriteIntegerCell(const AValue: Integer; const IncStatus: Boolean = True);
{写字符单元格}
procedure WriteStringCell(const AValue: string; const IncStatus: Boolean = True);
procedure WritePrefix;
procedure WriteSuffix;
procedure WriteHeader; {输出Excel标题}
procedure WriteTitle; {输出Excel列标题}
procedure WriteDataCell; {输出数据集内容}
procedure WriteFooter; {输出DBGridEh表脚}
procedure SaveStream(aStream: TStream);
procedure CreateProcessForm(AOwner: TComponent); {生成进度窗体}
{根据表格修改数据集字段顺序及字段中文标题}
procedure SetDataSetCrossIndexDBGridEh;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure ExportToExcel; {输出Excel文件}
published
property DBGridEh: TDBGridEh read FDBGridEh write SetDBGridEh;
property ShowProgress: Boolean read FShowProgress write SetShowProgress;
property TitleName: TCaption read FTitleName write SetTitleName;
property BeginDate: TCaption read FBeginDate write SetBeginDate;
property EndDate: TCaption read FEndDate write SetEndDate;
property UserName: TCaption read FUserName write SetUserName;
property FileName: string read FFileName write SetFileName;
end;
var
CXlsBof: array[0..5] of Word = ($809, 8, 0, $10, 0, 0);
CXlsEof: array[0..1] of Word = ($0A, 00);
CXlsLabel: array[0..5] of Word = ($204, 0, 0, 0, 0, 0);
CXlsNumber: array[0..4] of Word = ($203, 14, 0, 0, 0);
CXlsRk: array[0..4] of Word = ($27E, 10, 0, 0, 0);
CXlsBlank: array[0..4] of Word = ($201, 6, 0, 0, $17);
implementation
{ TDBGridEhTitle }
function TDBGridEhTitle.GetTitleColumn: integer;
var
i, ColumnCount: integer;
begin
ColumnCount := 0;
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
Inc(ColumnCount);
end;
Result := ColumnCount;
end;
procedure TDBGridEhTitle.GetTitleData(var TitleCell: TTitleCell);
var
i, Row, Col: integer;
Caption: string;
begin
FColumnCount := GetTitleColumn;
FRowCount := GetTitleRow;
SetLength(TitleCell, FColumnCount, FRowCount);
Row := 0;
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
begin
Col := 0;
Caption := DBGridEh.Columns.Title.Caption;
while POS('|', Caption) > 0 do
begin
TitleCell[Row, Col] := Copy(Caption, 1, Pos('|', Caption) - 1);
Caption := Copy(Caption, Pos('|', Caption) + 1, Length(Caption));
Inc(Col);
end;
TitleCell[Row, Col] := Caption;
Inc(Row);
end;
end;
end;
function TDBGridEhTitle.GetTitleRow: integer;
var
i, j: integer;
MaxRow, Row: integer;
begin
MaxRow := 1;
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
Row := 1;
for j := 0 to Length(DBGridEh.Columns.Title.Caption) do
begin
if DBGridEh.Columns.Title.Caption[j] = '|' then
Inc(Row);
end;
if MaxRow < Row then
MaxRow := Row;
end;
Result := MaxRow;
end;
procedure TDBGridEhTitle.SetDBGridEh(const Value: TDBGridEh);
begin
FDBGridEh := Value;
end;
{ TDBGridEhToExcel }
constructor TDBGridEhToExcel.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FShowProgress := True;
end;
procedure TDBGridEhToExcel.SetShowProgress(const Value: Boolean);
begin
FShowProgress := Value;
end;
procedure TDBGridEhToExcel.SetDBGridEh(const Value: TDBGridEh);
begin
FDBGridEh := Value;
end;
procedure TDBGridEhToExcel.SetBeginDate(const Value: TCaption);
begin
FBeginDate := Value;
end;
procedure TDBGridEhToExcel.SetEndDate(const Value: TCaption);
begin
FEndDate := Value;
end;
procedure TDBGridEhToExcel.SetTitleName(const Value: TCaption);
begin
FTitleName := Value;
end;
procedure TDBGridEhToExcel.SetUserName(const Value: TCaption);
begin
FUserName := Value;
end;
procedure TDBGridEhToExcel.SetFileName(const Value: string);
begin
FFileName := Value;
end;
procedure TDBGridEhToExcel.IncColRow;
begin
if FCol = DBGridEh.DataSource.DataSet.FieldCount - 1 then
begin
Inc(FRow);
FCol := 0;
end
else
Inc(FCol);
end;
procedure TDBGridEhToExcel.WriteBlankCell;
begin
CXlsBlank[2] := FRow;
CXlsBlank[3] := FCol;
Stream.WriteBuffer(CXlsBlank, SizeOf(CXlsBlank));
IncColRow;
end;
procedure TDBGridEhToExcel.WriteFloatCell(const AValue: Double; const IncStatus: Boolean = True);
begin
CXlsNumber[2] := FRow;
CXlsNumber[3] := FCol;
Stream.WriteBuffer(CXlsNumber, SizeOf(CXlsNumber));
Stream.WriteBuffer(AValue, 8);
if IncStatus then
IncColRow;
end;
procedure TDBGridEhToExcel.WriteIntegerCell(const AValue: Integer; const IncStatus: Boolean = True);
var
V: Integer;
begin
CXlsRk[2] := FRow;
CXlsRk[3] := FCol;
Stream.WriteBuffer(CXlsRk, SizeOf(CXlsRk));
V := (AValue shl 2) or 2;
Stream.WriteBuffer(V, 4);
if IncStatus then
IncColRow;
end;
procedure TDBGridEhToExcel.WriteStringCell(const AValue: string; const IncStatus: Boolean = True);
var
L: integer;
begin
L := Length(AValue);
CXlsLabel[1] := 8 + L;
CXlsLabel[2] := FRow;
CXlsLabel[3] := FCol;
CXlsLabel[5] := L;
Stream.WriteBuffer(CXlsLabel, SizeOf(CXlsLabel));
Stream.WriteBuffer(Pointer(AValue)^, L);
if IncStatus then
IncColRow;
end;
procedure TDBGridEhToExcel.WritePrefix;
begin
Stream.WriteBuffer(CXlsBof, SizeOf(CXlsBof));
end;
procedure TDBGridEhToExcel.WriteSuffix;
begin
Stream.WriteBuffer(CXlsEof, SizeOf(CXlsEof));
end;
procedure TDBGridEhToExcel.WriteHeader;
var
OpName, OpDate: string;
begin
//标题
FCol := 3;
WriteStringCell(TitleName, False);
FCol := 0;
Inc(FRow);
if Trim(BeginDate) <> '' then
begin
//开始日期
FCol := 0;
WriteStringCell(BeginDate, False);
FCol := 0
end;
if Trim(EndDate) <> '' then
begin
//结束日期
FCol := 5;
WriteStringCell(EndDate, False);
FCol := 0;
end;
if (Trim(BeginDate) <> '') or (Trim(EndDate) <> '') then
Inc(FRow);
//制表人
OpName := '制表人:' + UserName;
FCol := 0;
WriteStringCell(OpName, False);
FCol := 0;
//制表时间
OpDate := '制表时间:' + DateTimeToStr(Now);
FCol := 5;
WriteStringCell(OpDate, False);
FCol := 0;
Inc(FRow);
end;
procedure TDBGridEhToExcel.WriteTitle;
var
i, j: integer;
DBGridEhTitle: TDBGridEhTitle;
TitleCell: TTitleCell;
begin
DBGridEhTitle := TDBGridEhTitle.Create;
try
DBGridEhTitle.DBGridEh := FDBGridEh;
DBGridEhTitle.GetTitleData(TitleCell);
try
for i := 0 to DBGridEhTitle.RowCount - 1 do
begin
for j := 0 to DBGridEhTitle.ColumnCount - 1 do
begin
FCol := j;
WriteStringCell(TitleCell[j, i], False);
end;
Inc(FRow);
end;
FCol := 0;
except
end;
finally
DBGridEhTitle.Free;
end;
end;
procedure TDBGridEhToExcel.WriteDataCell;
var
i: integer;
begin
DBGridEh.DataSource.DataSet.DisableControls;
FBookMark := DBGridEh.DataSource.DataSet.GetBookmark;
try
DBGridEh.DataSource.DataSet.First;
while not DBGridEh.DataSource.DataSet.Eof do
begin
for i := 0 to DBGridEh.DataSource.DataSet.FieldCount - 1 do
begin
if DBGridEh.DataSource.DataSet.Fields.IsNull or (not DBGridEh.DataSource.DataSet.Fields.Visible) then
WriteBlankCell
else
begin
case DBGridEh.DataSource.DataSet.Fields.DataType of
ftSmallint, ftInteger, ftWord, ftAutoInc, ftBytes:
WriteIntegerCell(DBGridEh.DataSource.DataSet.Fields.AsInteger);
ftFloat, ftCurrency, ftBCD:
WriteFloatCell(DBGridEh.DataSource.DataSet.Fields.AsFloat);
else
if DBGridEh.DataSource.DataSet.Fields is TBlobfield then // 此类型的字段(图像等)暂无法读取显示
WriteStringCell('')
else
WriteStringCell(DBGridEh.DataSource.DataSet.Fields.AsString);
end;
end;
end;
//显示进度条进度过程
if ShowProgress then
begin
FGauge.Progress := DBGridEh.DataSource.DataSet.RecNo;
FGauge.Refresh;
end;
DBGridEh.DataSource.DataSet.Next;
end;
finally
if DBGridEh.DataSource.DataSet.BookmarkValid(FBookMark) then
DBGridEh.DataSource.DataSet.GotoBookmark(FBookMark);
DBGridEh.DataSource.DataSet.EnableControls;
end;
end;
procedure TDBGridEhToExcel.WriteFooter;
var
i, j: integer;
begin
if DBGridEh.FooterRowCount = 0 then exit;
FCol := 0;
if DBGridEh.FooterRowCount = 1 then
begin
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
begin
WriteStringCell(DBGridEh.Columns.Footer.Value, False);
Inc(FCol);
end;
end;
end
else if DBGridEh.FooterRowCount > 1 then
begin
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
if DBGridEh.Columns.Visible then
begin
for j := 0 to DBGridEh.Columns.Footers.Count - 1 do
begin
WriteStringCell(DBGridEh.Columns.Footers[j].Value, False);
Inc(FRow);
end;
Inc(FCol);
FRow := FRow - DBGridEh.Columns.Footers.Count;
end;
end;
end;
FCol := 0;
end;
procedure TDBGridEhToExcel.SaveStream(aStream: TStream);
begin
FCol := 0;
FRow := 0;
Stream := aStream;
//输出前缀
WritePrefix;
//输出表格标题
WriteHeader;
//输出列标题
WriteTitle;
//输出数据集内容
WriteDataCell;
//输出DBGridEh表脚
WriteFooter;
//输出后缀
WriteSuffix;
end;
procedure TDBGridEhToExcel.ExportToExcel;
var
FileStream: TFileStream;
Msg: string;
begin
//如果数据集为空或没有打开则退出
if (DBGridEh.DataSource.DataSet.IsEmpty) or (not DBGridEh.DataSource.DataSet.Active) then
exit;
//如果保存的文件名为空则退出
if Trim(FileName) = '' then
exit;
//根据表格修改数据集字段顺序及字段中文标题
SetDataSetCrossIndexDBGridEh;
Screen.Cursor := crHourGlass;
try
try
if FileExists(FileName) then
begin
Msg := '已存在文件(' + FileName + '),是否覆盖?';
if Application.MessageBox(PChar(Msg), '提示', MB_YESNO + MB_ICONQUESTION + MB_DEFBUTTON2) = IDYES then
begin
//删除文件
DeleteFile(FileName)
end
else
exit;
end;
//显示进度窗体
if ShowProgress then
CreateProcessForm(nil);
FileStream := TFileStream.Create(FileName, fmCreate);
try
//输出文件
SaveStream(FileStream);
finally
FileStream.Free;
end;
//打开Excel文件
ShellExecute(0, 'Open', PChar(FileName), nil, nil, SW_SHOW);
except
end;
finally
if ShowProgress then
FreeAndNil(FProgressForm);
Screen.Cursor := crDefault;
end;
end;
destructor TDBGridEhToExcel.Destroy;
begin
inherited Destroy;
end;
procedure TDBGridEhToExcel.CreateProcessForm(AOwner: TComponent);
var
Panel: TPanel;
Prompt: TLabel; {提示的标签}
begin
if Assigned(FProgressForm) then
exit;
FProgressForm := TForm.Create(AOwner);
with FProgressForm do
begin
try
Font.Name := '宋体'; {设置字体}
Font.Size := 9;
BorderStyle := bsNone;
Width := 300;
Height := 100;
BorderWidth := 1;
Color := clBlack;
Position := poScreenCenter;
Panel := TPanel.Create(FProgressForm);
with Panel do
begin
Parent := FProgressForm;
Align := alClient;
BevelInner := bvNone;
BevelOuter := bvRaised;
Caption := '';
end;
Prompt := TLabel.Create(Panel);
with Prompt do
begin
Parent := Panel;
AutoSize := True;
Left := 25;
Top := 25;
Caption := '正在导出数据,请稍候......';
Font.Style := [fsBold];
end;
FGauge := TGauge.Create(Panel);
with FGauge do
begin
Parent := Panel;
ForeColor := clBlue;
Left := 20;
Top := 50;
Height := 13;
Width := 260;
MinValue := 0;
MaxValue := DBGridEh.DataSource.DataSet.RecordCount;
end;
except
end;
end;
FProgressForm.Show;
FProgressForm.Update;
end;
procedure TDBGridEhToExcel.SetDataSetCrossIndexDBGridEh;
var
i: integer;
begin
for i := 0 to DBGridEh.Columns.Count - 1 do
begin
DBGridEh.DataSource.DataSet.FieldByName(DBGridEh.Columns.Items.FieldName).Index := i;
DBGridEh.DataSource.DataSet.FieldByName(DBGridEh.Columns.Items.FieldName).DisplayLabel
:= DBGridEh.Columns.Items.Title.Caption;
DBGridEh.DataSource.DataSet.FieldByName(DBGridEh.Columns.Items.FieldName).Visible :=
DBGridEh.Columns.Items.Visible;
end;
for i := 0 to DBGridEh.DataSource.DataSet.FieldCount - 1 do
begin
if POS('*****', DBGridEh.DataSource.DataSet.Fields.DisplayLabel) > 0 then
DBGridEh.DataSource.DataSet.Fields.Visible := False;
end;
end;
end.